are tracks fairly universal?

I'm looking for a new-to-me excavator, and see some that need tracks and chains, which I don't mind if the price is good, nothing ticks me off more than seeing new inferior parts on a machine. this way I can buy a good set and not worry.

Are chains for steel pads fairly universal? from the rubber tracked machines I read that basically the pitch and the number of links is needed. Can I put dozer chains on an excavator? I like the idea of lubed links

are tracks fairly universal?